Cap for vaporous liquid tanks



March 22,1932. 1 .3 1,850,730

CAP FOR VAI OROUS LIQUID TANKS Filed Dec. 1 1930 'vide a readily a protected vent for Patented Mar. '22, J1 932 a z Gnonen msmss, on'ro nndomo on? non veronous ff Q" I Application-tiled December My'inventionihas for its object to provide a cap or cover for the mouth of a tank or con tainer in which a liquid'may be stored. The invention has for its vparticular object to proremovable, durable cap for a tankor container, forcontaining volatile liquids and having rigid engaging parts and maintaining atmospheric pressure, notwithstanding withdrawal of the liquid or its evaporation:

The invention may becontained in cape e that vary in their details of constructionand,

toillustrate a practical application of the invention, "have selectedo a cap containing the invention asan example of the various that embody the inven-' forms of structures -tion, and shall describe the cap selected, hereinafter. The cap selected for purposes of illustration is shown in the accompanying F1'g.,1illustrates a perspective view of the cap-in an inverted ,POSltlOIL, Fig. 2 illustrates across section'of the capand container opening when the cap is installed over the opening, Fig. 3illustratesa cross section of the cap in aninverted position. Fig; 4 illustrates an enlarged top portion" ofthe cap.

r ly 'tion or bending when-- neckot the openingqfThe construction of The invention provides a cap which isparticularly adaptable to V cover openings of containers for liquids, and from which the liquidsare Withdrawn.

about the opening of the container: by a pair of legs. vPortions ofthe legsqengage the w neck of the opening to hold the cap "tightly over the opening. The legs are bent to have a channeled shape in cross section which strengthens the legs gagainst distorthe cap prevents theientrance of :air other than that' whichis requiredio prevent the existence of a vacuous 'conditionin the tankdue to withdrawal likewise prevents the escape, container ,which'fmay of the liquid. The cap v [of air from the contain a substantial amount of volatilized I the container, thereby" reducing the tendency Q6 of thefliquid toevaporate. "The c ap also pree vents theaescapeofr'the liquid through the The cap is held 1 fluid, which may be in- 1 ;vD305. seriamq nsazsa.1' i

7 opening within the container; f-Thecapl, shown flange 2.. The flange 2'has, substantially,"the

diameter of the exterior of the neck 3 of the it that is closed by,

. opening '5 of the; container the-cap. Y V V 1 The cap l is held in position about the neck 3- of ,the container opening 5 by a Ueshaped cated; in the top portion 8 of thecap ,1 and. is secured theretoby rivets 10 which engage the U-shapedmember and the cap? 7 the splashing action; ofthe liquid in the drawings; a

v 'QTheIU -shaped member 9 isforinedlto -;legs 11 :having, horizontally extending poritions13 which are adaptedto engage portions of theneck oftheopening ofthe container; .The legsrll and horizontally extending por- 'tions13carebent to have a'cylindrical 'ch'anneledshape in cross sectioniwhich strengthens 5 thelegs andzhorizontally extendingportions I? againstga ,bending movement when the cap cross sectional view of the, :is installed over theopening-ofthe container andallows-ior ease? of operation of the exe tending portions l3 over tions -12,-of-,theneck 3 of the opening, the cap is being affixed over the opening.

The neck portions. 12"which {for-m camsurfacesl t.

Theportionsl3 aread pted to ride over the increasingly draw the cap ,down-on the opening toefiect a sllb stantially tight coveringwhichwiH prevent he; liquid -which may be Q0111 i 1 camisurfaces-leato -:.tightly;

:the legs engage the; ,tained 1within thecontainer4;. 1 V

In order to allowffor the entrance of; air if :in; container ,4, as} a small opening 15in can: QA'n op n ng:

it is emptied, I; provide v opening 17 has a collar 18ywhich extends v aroundith The. collar, 18 is formed so that;

its edgesare inclined'towards eachotherfto prevent thelescape 0 e-i er-ed ej r-- when 3 of the opening15' has inner edge V 1 1 p rtion 8 Q the ll is likewise formed in 1 theweb-lG of they U-. shaped member 9; The

f liquid which maybe a -i 20 which tends to prevent the rapid escape of air from within the tank which ma contain volatilized portions of the liquid thereby cutting down the evaporation of the liquid by 5 reasonof the substantial inactivity of the air located within the chamber 20. beA suitable washerl 21 foghmed of cork, rubr, 0 some e ua ly cu iomn" g r may b o: located izbout the edgesbf tii portion 8 so as to cushioningly engage with the opening 3 and efiectivelyseal it. I Iclaim: f W

1. In a ca or a contain r .y liquids, the ontainer havin g zf iiecl t iic? having inturned cam shaped flanges, the gap having a centrally outwardly protruding dome shaped part,"the dome shaped partha'y' ing a central 0 ening, a sheet metal ine niber secured central 'tothe cap ahd having a cir- 29 oular disc-shaped central portion, the disc shaped central portion having an opening, the-openinghaving a diameter substantially the same as the major diameter of the said dome shaped portion, the disc'shaped portion having a flange surrounding the said opening and projecting inwardly with respect to the container, legs extending radially from the 7 periphery of the disc shaped portion" and formed integral with the disc shaped portion neck.

2. In a cap for a container for eva ori zable liquids, the'contain'er 'li'avi'n fa-nee ,the neck having inturne d cam shape flanges, the

cap having a; centrally raised dorneshap'ed part, the dome shaped part having a central opening, a sheet' netal member secured' centrally to the' ca'p and having a circular disc shaped central portion, the'disc sh'apdcentral portion'having' an'opening,-the opening having a diameter substantially the same as the major diameter of the said dor'ne' shaped portion,' the disc shaped "ortion {having flanges,'one extending perip erally andthe other surroundingthe'said 0' pin in the disc shaped portion, the {disc Ja'pe portion havin 'on opposite sidesf-thereofa pair of radial l extendin legs "substantially; U- shapedin cross section-and formedintegra ll 1 with the said central disc'sha-ped portion and protruding from theedge of the said ripheral flange to enga' e-tli'e flange's oft check whereby thesaid'mges of the 'chtral' disc shaped portion opeifate to prev ntgegress of the li uid through the op ing inthe dome j shape portion when shaken. g a r In witness'wherejof I have hereunto si ed m name to this s edficamn; i

and protruding to engage the flanges otthe a 

